Electric switch



F'. MOQE ELECTRIC SWITCH Filed oct. 12, 1953 2 shears-sheet 1 @midi/Woof@ E R O O M R. F

ELECTRIC SWITCH 2 Shee'ts-Sheet Filed Oct. l2, 1953 Patented July 16, 1935 i.. 1 L

UNITEDQSTATES PATENT oFFlcE ELECTRIC SWITCH `Frank BQ Moore, Upper Darby, Pa., assigner, by mesne assignments, to Harvey C. Bridgers, Blue Ridge Summit, Pa.

Application october 12, 1933, seriai No. 693,367

` A 2 claims. (o1. zoo-s3) i 'I'his invention relates to pressure 'operated of'contact pins 36 which may be connected by a electric switches and its object is to provide a simbar 31. 'I'he lever 34 is preferably madeof insuplified pressure operated switch in which the conlating material but may be made of conductive tact making element is operated by a single material in which latter case contacts 36 will be 5 spring which is arranged so as to produce a quick insulated from the lever. Mounted upon or made `5 snap action. integral with the post 30 is a block 38 which also A further general object is to provide a pressure carries contact pins 39. Binding posts 40 and 4I operated switch adapted for any and all uses for are connected to these contact pins and wires 42 making and breaking a circuit in response to and 43 are connected respectively to the binding variation in some pressure condition in a system posts 40 and 4I. The shaft 28 upon which the lo with which the switch is associated. lever 21 is mounted extends through the post 30 Referring to the accompanying drawings, and carries an arm 44 rigidly secured on its opwhich are made a part hereof and on which simiposite end to which arm is xed a split pin 45. A

lar reference characters indicate similar parts, spring 46 is secured by means of screws 41 and Figure 1 is a side elevation partly in section of locks 48 to post 30 and is positioned in the slit in ,i5 my switch, the pin 45. This spring is slightly bulged so as Figure 2, a plan view of the switch with the to provide a snap action as the lever 41 isrocked cover of a casing removed, back and forth by means of the piston I9. A cover Figure 3, a SeCtiOn 0n line 3-3 0f Figure 1, 49 may be secured upon the base and held in posi- Figure 4, a section on line 4-4 of Figure l, and tion by a nut 5D. 20

Figure 5, a section online 5 5 of Figure 4. In operation pressure iluid is supplied to the In the drawings numeral I0 indicates the base chamber I1 through the tube I8. When this prese 0f the SWitCh having en upright portion Il in sure reaches a predetermined point the spring 2i which iS mounted a Cylinder I2 which is secured is compressed and the rod I9 moved to the left to in the DOltiOn by Ineens Of the SCreW I3. A rock the lever 21 clockwise of the position shown 25 diaphragm i4 iS Secured against a Shoulder l5 in in Figure 1. When the lever 21 has been rocked an enlarged end 0f the Cylinder l2 by Ineens Gf a clockwise suiliciently to buckle the spring 46 this Cap l5 Which iS threaded inte the enlarged end spring snaps to the opposite extreme and causes 0f the cylinder so as to Secure the diaphragm in the upper end of the lever 21, by means of the pin 3o position. A chamber l1 is provided between the 33, to rock the lever 34 eounterclockwise, when 30 Cep and the diaphragm and an inlet pipe I8 iS viewed in the position shown in Figure l, to sepathreaded intO the Call A Suitable ail' cndllit 0i rate contacts 36 and 31 and break circuit through other fluid conduit, not shown, may be attached Wires 42 and 43, t0 the end 0f the Pipe i3 for Supplying fluid under While in the embodiment of the invention as pressure t0 theehmber l 7- shown pressure iiuid is used to operate the switch, 35

A rod I9 is suitably secured to the diaphragm the invention is not limited in its use in this I1 as by means 0f Washers 01' nlltS 20 A 00inrespect. The rod I9 which is operatively con- Dl'eSSiOn Spring 2| iS DOSitiOned Within the Cylinder nected to the switch may be operated in any man- 12 and is conilned between washers 22 and 23. ner Such for example as a push button which op- 40 A Plug 24 iS threaded into the inner end 0f the erates directly or indirectly on the rod in opposi- 40 Wunder l2 and engages the Washer 23 and Serves tion to the spring 2I or even in the absence of t0 tension th? Sprmg 2L The inner end of the the spring 2| in which case it operates simply to rod 's is provldfd Wlth space@ collars. and 25' snap the flat spring 46 to each limit of movement. the latter of Winch my b.e adJuste .axially of the Of course after the spring 46 is moved a prededasgeggrguzrsed glgsdspgslggnnel 'termined distance it will buckle and move itself 40 28 which is journaled in a bushing 29 in a standmlllll) far Oen grplosehe fmalrivtlttcl' ard 30 which standard is secured to the base I0. s. o e pe ec y o nous ere Ore a e 'I'he lower end of the lever 21 carries a pin 3i spring may be caused to be buckled by pressule 50 which is positioned between and engaged by the fluld or by any other pressure means or mechani- 50 collars 5| and 25 The upper end of the lever cal means by which 1t 1s caused to move a cer- 21 is forked as shown at 32 and between these tain distance after which it will buckle to move forks is positioned a pin 33 on the lower end of itself t0 the limit in that directiona lever 34 which lever is pivoted at 35 to the post While double contacts have been shown it is 30. The upper end of the lever 34 carries a pair obvious that the switch could be made with only 55 single contacts with one of the wires 42 or 43 attached to the contact 3B.

It will be obvious to those skilled in the art that various changes may be made in my device without departing from the spirit of the invention and therefore I do not limit myself to what -is shown in the drawings and described in the specification, but only as indicated by the appended claims. f 1 Q Q f Having thus fully'described my saidinvention,

what I claim as new and desire to securer by ,Let-

K v/contact element mounted thereon, a second conters Patent, is:

1. An electric switch comprising a basea"cyl inder mounted on said base, a diaphragm posi--V tioned within said cylinder, means for supplying pressure fluid to said cylinder ands'against'one side of said diaphragm, a spring acting against said diaphragm and in opposition to said pressure, a rod secured to said diaphragm and extending out through said cylinder, a pair of spaced collars shaft, lsaid arm carrying a split pin yadjacent'ritsV outer end, a fiat spring fixed,` at each end and passing through the split inthe said pin, a sec'- ond lever pivotally mounted on said base,'said lever having an element thereon engageable by ,said first named lever in each direction of movement of said first lever, and having a contact element thereon, a fixed contact element on said base, flexing of the said diaphragmy causing a snap action movement-of said contacts together and apart asrtheipressure ofsaid'pressure uid Varies aboveand below a'predete'rmine'd degree'.

2. A switch comprising a support having a fixed tactelement movable into and out of engagement with the fixed contact, a lever operatively con- "nected tosaidmovable contact, a shaft support-y 'and securedateach end in xed position on said support,` and pressure fluid means for rocking said lever, and thereby biasing said spring first in vone direction to opensaid contactsand ,then in the other directionlto close the4 contacts, vsaid spring operating to l-causea snap action move- 

